We now use a separate USB configuration for CPLD updates. To avoid
misuse of the interface, hackrf_cpld_write is now a one-shot call,
expecting the entire CPLD buffer. The library will then take care that
the device is placed in the CPLD update configuration and the entire
buffer uploaded. Unfortunately, this means that users of the interface
will have substantially fewer opportunities to provide status updates to
the user.
* Added new hackrf_error especially for streaming to return more details.
* Adding management of usb transfer cancelled for hackrf_stop_rx()/hackrf_stop_tx().
* Added robustness on hackrf_close() to correctly close libusb related stuff even if USB device is removed or other problems.
* Fixed threading problems (start, stop() then start() ...).
* Cleanup the whole code.
Add max2837_set_lpf_bandwidth() function to choose available LPF filter bandwidth based on bandwidth in Hz.
Change configuration of MAX2837 to set LPF_EN and FT at max2837_setup(), not in max2837_rx() or max2837_tx() (which was overriding prior filter configuration).
Implement switching between several supported sampling rates for Jellybean and Jawbreaker.
Commit bits of the Si5351C USB request support that I apparently missed in a prior commit.
